Metallurgical furnace



(No Model.) I i 2 Sheefs-Sheti 1. W. STUBBLEBINE.

METALLURGICAL FURNACE. .No. 498,089. Patented' May Z 1893. '1

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. v METALLURGICAL FURNACE. No'. 498,089. Patented May 23, 1893.

UNITED STATES PATENT QFFICE.

IVILLIAM STUBBLEBINE, OF BETHLEHEM, ASSIGNOR TO THE STUBBLEBINE FURNACECOMPANY, OF PHILADELPHIA,PENNSYLVANIA.

METAVLLU RGICAL FU R Ac E.

SPECIFICATION forming part of Letters Patent No. 498,089, dated May 23,1893. Application filed October 10, 18 92 Serial No. 4%,403- (No model.)

T at whom it may concern:

Be it known that I, WILLIAM STUBBLEBINE, a citizen of the United States,residingat Bethlehem,in the county of Northampton and State ofPennsylvania, have invented certainnew and useful Improvements inMetallurgical Furnaces; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The present invention is an improvement in reverberatory furnacesadapted for use as a heating, puddling, open hearth or other forms ofmetallurgical furnaces; and it is more particularly designed as animprovement on the furnace of the class forming the subject of UnitedStates Letters Patent No. 456,663, issued to me on the 28th day of July,1891.

The object in view is to attain themore perfect utilization andcombustion of the waste heat and gases from the working or puddlingchamber of the furnace, and to control the blast and heat supplied totheprimary grate or combustion chamber by means of a single valve sosituated as to be easilyma nipulated by the workman. In this instance, Icombine with a working chamber, an uptake, and a grate chamber, a seriesof heating chambers situated on opposite sides of the uptake andcommunicating with the rear part of the working chamber, heating coilsin each of said chambers, a single blast-pipe having its branchescoupled to the heating coils and provided with a regulating valve, andindependent blast pipes extending longitudinally within the side wallsof the furnace and each pipe coupled at one end to the heating coils anda branch of the blast pipe, the opposite ends of said longitudinal blastpipes opening into the grate chamber.

My invention further consists in the combination with a working chamberand an uptake, of heating chambers situated on opposite sides of theuptake and communicating with the rear part of said working chamber,mixing flues extending longitudinally Within the sides of the furnaceand communicating at one end, with said heating chambers, heating coilsin said heating chambers and discharging into the mixing fiues, adischarge chamber situated above the Working chamber, near the bridgewall, connected with the longitudinal mixing fines, and provided withdischarge openings into the Working chamber, and anotherdischargechamber situated above the rear part of said working chamber, providedwith openings in its bottom, and having direct connection with airheating coils.

My invention further consists in the combination with a working chamberand an-uptake, of heating chambers situated on opposite sides of theuptake and communicating with the working chamber, heating coils in saidheating chambers, discharge chambers extending transversely across theworking chamber and provided with passages which open into saidworkingchamber, mixing flues extending longitudinally Within the sidesof the. furnace and connected at their rear ends with said heatingchambers and with the heating coils therein, and discharging at theirfront ends into one of the discharge chambers, and a connecting pipebetween the other discharge chamber and the heating coils.

Another improvement which I have made consists in the combination with aworking chamber and its rear flue wall, of side pipes extendinglongitudinally within the sides of the furnace and provided with lateraloutlets which discharge into the working chamber at the upper sidethereof, a valved supply pipe coupled to the front ends of the sidepipes, and atransverse pipe in the rear flue wall, connected to the rearends of the side pipes, and having outlets which open into the workingchamber.

The accompanying drawings fully illustrate my improved furnace, inwhich-- 0- Figure 1 is a vertical longitudinal sectional view on theplane indicated bythe dotted line -.rac of Fig. 2. Fig. 2-is ahorizontal sectional view on the plane y-y of Fig. 1. Fig. 3 is avertical cross sectional view on the line m, m, 9 5 of Figs. 1 and 2,and Fig. 4 is a similar sectional View on the line 0-0 of Figs. 1 and 2.

Like letters of reference denote like parts in all the figures of thedrawings.

In said drawings, A is the puddling or working chamber of mymetallurgical furnace.

B is the primary combustion chamber situated at the front end of thefurnace, and G is the central uptake at the opposite rear end of thefurnace and communicating with the working or puddling chamber A by theusual neck 0.

The combustion chamber B is provided with the usual grate b, but anykind of carbonaceous or hydrocarbon fuel can be supplied and consumed inthis chamber, the heat and gases resulting from such combustion beingdischarged over the bridge wall Z) directly into the working chamber.

At the rear end of the furnace, and on opposite sides of the uptake 0thereof, are the two heating chambers D, E, each of which communicateswith the rear part of the working or puddling chamber, A, by means ofthe passages 6 so as to receive a part of the waste heat and gases fromsaid working or puddling chamber and which are utilized, partially,toheat the heating coils F, G, and to be drawn into the mixing fines H, I,the latter extendin g longitudinally of the furnace to convey such wasteheat and gases back to the front of the furnace, either into gaschambers or directly into the front of the working or puddling chamber.The air-heating coils F, G, are arranged in vertical positions in theheating chambers D, E, and each air-heating coil has a series of jetpipesf, g, which lead from the upper partof their respective coils andextend a short distance in the rear part of the longitudinal mixingfines, the jet pipes f of the heating coil F discharging into the seriesof fiues or pipes Hand the other series of pipes g of the coil Gdischarging into the other series of mixing fines I, as shown in thedrawings.

The air blast is supplied to the heating-coils F, G, by a single blastpipe K provided with the branches It, 7a, which pass through the rearend wall of the furnace and connect with the lower ends of said coils F,G, as shown by Figs. 1 and 2; and said blast pipe K is further providedwith the single gate or valve by adjusting which the Volume of airadmitted to the heating coils and pipes can be regulated.

The blast of air to the primary combustion chamber 0 is supplied bymeans of the pipes L L the furnace, longitudinally of the same. Each ofsaid internal blast pipes L, L,'is connected at the rear end to thelower part of the heating coil, and about the point where the branch 7cof the blast pipe K is connected to said coil, so that the pipes L, L,receive a portion of the air blast supplied by the pipe K to the heatingcoils. internal blast pipes L, L, terminate in ports L on opposite sidesof the primary combustion chamber C, and as the air blast passes throughthese pipes or fines L, L, it is heated and discharged in such conditioninto the primary combustion chamber, at any suitable point therein, asfor instance belowthe grate 0, see Figs. 1 and 2.

. which extend through the side walls of The front ends of the M, N, aretwo discharge chambers situated on the top or roof of the furnace, overthe working or puddling chamber therein. The

gas chamber M lies over the front part of the,

working chamber, near to the bridge wall c, and in its lower or bottomside said chamber has a series of openings on which extend through theroof of the puddling or working chamber to discharge in to said workingchamber. The front ends of the longitudinal mixing flues H, I, openthrough the ports m into the front discharge chamber M, at opposite endsof the same; and thus the heated air and gases receive from the heatingchambers D, E, and the air blast from the heating coils, which arecommingled in the mixing flues and heated during theirpassage throughsaid dues, are discharged through the ports m into the discharge chamberM and thence through the openings on into the Working chamber. The otherelevated dischargechamber N is located in front of the rear flue wall atthe neck of the furnace, and this chamber N receives air from the airheating coils F, G, through the pipes N, N. Said chamber N is alsoprovided in its lower side with the series of discharge openings at thatextend through the roof of the working chamber, whereby the heated airreceived bythe chamber N from the airhcating coils F, G,are dischargedinto the rear part of the working chamber A. These two dischargechambers M, N, extend transversely across the working chamber of thefurnace, and they serve as the convenient means for discharging theheated gases and air of the mixing flues and air heating coils into theworkingchamber.

1 have also provided means for admitting heat to the upper part of theworking cham ber at different points along its two side walls and therear flue wallO of the furnace. This means consists of the longitudinalpipes 'P,

Q, which are arranged in the side walls of the furnace, and thetransverse pipe R in the rear flue wall 0 thereof, each of these pipesbeing provided with a series of transverse passages 11, which extendthrough the furnace walls into the working chamber. The transversedischarge pipe R connects'with the ends of the side pipes P, Q, at therear part of the furnace, a-nd'it lies a sufficient distance above theneck and flues d in the rear flue wall. The front ends of the sidepipesor flues P, Q, are coupled by a pipe q in the front end wall of thefurnace, and to this pipe qis coupled the supply pipe P having agate orvalve therein.

Having thus fully described my invention, what I claim is 1. 'In afurnace, the combination, with a working chamber, an uptake, and a gratechamber, of the heating chambers situated on opposite sides of theuptake and communicating with the rear part of the working chamber, theheating coils in each ofsaid heating chambers, the single blast-pipe Khaving its branches coupled to the heating coils and provided with aregulating gate is, andthe independent blast pipes L, L, extendinglongitudinally within the side walls of the furnace and each pipecoupled to one of the heating coils and a branch of the blast pipe K,the opposite ends of said longitudinal blast pipes- L, L, opening intothe grate chamber, for the purpose described, substantially as setforth.

2. In a furnace, the combination with the working chamber and an uptake,of the heating chambers situated on opposite sides of the uptake andcommunicating with the rear part of said working chamber, the mixingflues extending longitudinally within the sidesof the furnace andcommunicating, at their ends, with said heating chambers, the heatingcoils situated within'the heating chambers and discharging into themixing fines, the discharge chamber M situated above the workingchamber, near the bridge wall, and connected with r, the longitudinalmixing flues, and provided with the discharge openings m, and anotherdischarge chamber N situated above the rear part of the working chamber,provided with the openings n in its bottom, and having direct connectionwith the air heating coils, substantially as and for the purposedescribed.

3. In a furnace, the combination with a Working chamber and an uptake,of the heating chambers situated on opposite sides of the uptake andcommunicating with the working chamber, heating coils in said heatingchambers the discharge chambers M, N,extending transversely across theworking chamber and provided with passages which open into said workingchamber, the mixing flues extending longitudinally within the sides ofthe furnace and connected at their rear ends with the heating chambersand with the heating coils therein and discharging at their front endsinto the chamber M, and the connecting pipes N between the chamber N andthe heating coils, substantially as and for the purpose described.

4. In a furnace, the combination with a working chamber and its rearflue wall, of the side-pipes P, Q, extending longitudinally within thesides of the furnace andprovided with the lateral outlets p whichdischarge into the working chamber at the upper side thereof, the valvedsupply pipe P coupled to the front ends of said side-pipe, and thetransverse pipe R in the rear flue-wall, connected to the rear ends ofthe side pipes, and pro vided with the lateral outlets extending intothe working chamber at right angles to the outlets of the side pipes,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.WM. STU BBLEBIN E.

Witnesses:

W. A. ERWIN, ELLA J. BAUM.

